H5DJR, I'm sure I saw your car near Wyboston yesterday lunchtime! (I work near there..)
Anyway, I have to agree that fitting these kits is a bad idea unless you have projector headlamps.
The legality thing is something only you can decide if you can live with, but it's critical that you don't end up with something that will dazzle others or attract the attention of the boys in blue.
I've fitted these kits in the past to a BMW which had halogen reflectors, and it was a disaster in terms of scattering light all over the place.
Fitting them to a A3 (8L) model was more successful, but that had projector lamps, and gave a nice clean beam cut off that didn't dazzle other drivers. That also sailed through 2 mots with them fitted, and although it had washers but no self levelling, it was still technically illegal.
As a minimum, I would only recommend them on the A3 (8P) if you're going to fit projector lamps as well.